/* ==========================================================================
   Layout — 공통 레이아웃 규칙
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 999;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
}

/* Visible focus state (accessibility) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Main content minimum height so Footer doesn't ride up on short shells */
main {
  min-height: 50vh;
}

/* Section spacing baseline (used sparingly at shell stage) */
.section {
  padding: 64px 0;
}

@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }
}